Hauberk

n. long coat of chain mail (worn as defensive armor)

A hauberk is a shirt of chain mail armour. The term is usually used to describe a shirt reaching at least to mid-thigh and including sleeves. Haubergeon ("little hauberk") generally refers to a shorter variant with partial sleeves, but the terms are often used interchangeably.[1] Slits to accommodate horseback-riding are often incorporated below the waist. Most are put on over the head. Hauberk can also refer to a similar garment of scale armour.
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Noun
1. a long (usually sleeveless) tunic of chain mail formerly worn as defensive armor
(synonym) byrnie
(hypernym) chain mail, ring mail, mail, chain armor, chain armour, ring armor, ring armour

(v. t.)
A coat of mail; especially, the long coat of mail of the European Middle Ages, as contrasted with the habergeon, which is shorter and sometimes sleeveless. By old writers it is often used synonymously with habergeon. See Habergeon.
  

A mail shirt, generally extending down to defend the legs. The hauberk was the main defense for both body and legs until the late 13th century, when armourers began to experiment with reinforcing using padded, courboille , and even rudimentary plate augmentations.